Remove building with NOCRYPTO option
[minix.git] / minix / kernel / priv.h
blob66fceffab456344b23f5043b5e09631b45e9fbf8
1 #ifndef PRIV_H
2 #define PRIV_H
4 /* Declaration of the system privileges structure. It defines flags, system
5 * call masks, an synchronous alarm timer, I/O privileges, pending hardware
6 * interrupts and notifications, and so on.
7 * System processes each get their own structure with properties, whereas all
8 * user processes share one structure. This setup provides a clear separation
9 * between common and privileged process fields and is very space efficient.
11 * Changes:
12 * Nov 22, 2009 rewrite of privilege management (Cristiano Giuffrida)
13 * Jul 01, 2005 Created. (Jorrit N. Herder)
15 #include <minix/const.h>
16 #include <minix/priv.h>
17 #include "kernel/const.h"
18 #include "kernel/type.h"
19 #include "kernel/ipc_filter.h"
21 struct priv {
22 proc_nr_t s_proc_nr; /* number of associated process */
23 sys_id_t s_id; /* index of this system structure */
24 short s_flags; /* PREEMTIBLE, BILLABLE, etc. */
25 int s_init_flags; /* initialization flags given to the process. */
27 /* Asynchronous sends */
28 vir_bytes s_asyntab; /* addr. of table in process' address space */
29 size_t s_asynsize; /* number of elements in table. 0 when not in
30 * use
32 endpoint_t s_asynendpoint; /* the endpoint the asyn table belongs to. */
34 short s_trap_mask; /* allowed system call traps */
35 sys_map_t s_ipc_to; /* allowed destination processes */
37 /* allowed kernel calls */
38 bitchunk_t s_k_call_mask[SYS_CALL_MASK_SIZE];
40 endpoint_t s_sig_mgr; /* signal manager for system signals */
41 endpoint_t s_bak_sig_mgr; /* backup signal manager for system signals */
42 sys_map_t s_notify_pending; /* bit map with pending notifications */
43 sys_map_t s_asyn_pending; /* bit map with pending asyn messages */
44 irq_id_t s_int_pending; /* pending hardware interrupts */
45 sigset_t s_sig_pending; /* pending signals */
46 ipc_filter_t *s_ipcf; /* ipc filter (NULL when no filter is set) */
48 minix_timer_t s_alarm_timer; /* synchronous alarm timer */
49 reg_t *s_stack_guard; /* stack guard word for kernel tasks */
51 char s_diag_sig; /* send a SIGKMESS when diagnostics arrive? */
53 int s_nr_io_range; /* allowed I/O ports */
54 struct io_range s_io_tab[NR_IO_RANGE];
56 int s_nr_mem_range; /* allowed memory ranges */
57 struct minix_mem_range s_mem_tab[NR_MEM_RANGE];
59 int s_nr_irq; /* allowed IRQ lines */
60 int s_irq_tab[NR_IRQ];
61 vir_bytes s_grant_table; /* grant table address of process, or 0 */
62 int s_grant_entries; /* no. of entries, or 0 */
63 endpoint_t s_grant_endpoint; /* the endpoint the grant table belongs to */
64 vir_bytes s_state_table; /* state table address of process, or 0 */
65 int s_state_entries; /* no. of entries, or 0 */
68 /* Guard word for task stacks. */
69 #define STACK_GUARD ((reg_t) (sizeof(reg_t) == 2 ? 0xBEEF : 0xDEADBEEF))
71 /* Magic system structure table addresses. */
72 #define BEG_PRIV_ADDR (&priv[0])
73 #define END_PRIV_ADDR (&priv[NR_SYS_PROCS])
74 #define BEG_STATIC_PRIV_ADDR BEG_PRIV_ADDR
75 #define END_STATIC_PRIV_ADDR (BEG_STATIC_PRIV_ADDR + NR_STATIC_PRIV_IDS)
76 #define BEG_DYN_PRIV_ADDR END_STATIC_PRIV_ADDR
77 #define END_DYN_PRIV_ADDR END_PRIV_ADDR
79 #define priv_addr(i) (ppriv_addr)[(i)]
80 #define priv_id(rp) ((rp)->p_priv->s_id)
81 #define priv(rp) ((rp)->p_priv)
83 #define id_to_nr(id) priv_addr(id)->s_proc_nr
84 #define nr_to_id(nr) priv(proc_addr(nr))->s_id
86 #define may_send_to(rp, nr) (get_sys_bit(priv(rp)->s_ipc_to, nr_to_id(nr)))
87 #define may_asynsend_to(rp, nr) (may_send_to(rp, nr) || (rp)->p_nr == nr)
89 /* The system structures table and pointers to individual table slots. The
90 * pointers allow faster access because now a process entry can be found by
91 * indexing the psys_addr array, while accessing an element i requires a
92 * multiplication with sizeof(struct sys) to determine the address.
94 EXTERN struct priv priv[NR_SYS_PROCS]; /* system properties table */
95 EXTERN struct priv *ppriv_addr[NR_SYS_PROCS]; /* direct slot pointers */
97 /* Make sure the system can boot. The following sanity check verifies that
98 * the system privileges table is large enough for the number of processes
99 * in the boot image.
101 #if (NR_BOOT_PROCS > NR_SYS_PROCS)
102 #error NR_SYS_PROCS must be larger than NR_BOOT_PROCS
103 #endif
105 #endif /* PRIV_H */